Urho3D/Source/Samples/02_HelloGUI/HelloGUI.cpp
2021-07-17 16:43:46 +00:00

226 lines
7.6 KiB
C++

//
// Copyright (c) 2008-2021 the Urho3D project.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
#include <Urho3D/Core/CoreEvents.h>
#include <Urho3D/Engine/Engine.h>
#include <Urho3D/Graphics/Graphics.h>
#include <Urho3D/Graphics/Texture2D.h>
#include <Urho3D/Input/Input.h>
#include <Urho3D/Resource/ResourceCache.h>
#include <Urho3D/UI/Button.h>
#include <Urho3D/UI/CheckBox.h>
#include <Urho3D/UI/LineEdit.h>
#include <Urho3D/UI/Text.h>
#include <Urho3D/UI/ToolTip.h>
#include <Urho3D/UI/UI.h>
#include <Urho3D/UI/UIEvents.h>
#include <Urho3D/UI/Window.h>
#include "HelloGUI.h"
#include <Urho3D/DebugNew.h>
URHO3D_DEFINE_APPLICATION_MAIN(HelloGUI)
HelloGUI::HelloGUI(Context* context) :
Sample(context),
uiRoot_(GetSubsystem<UI>()->GetRoot()),
dragBeginPosition_(IntVector2::ZERO)
{
}
void HelloGUI::Start()
{
// Execute base class startup
Sample::Start();
// Enable OS cursor
GetSubsystem<Input>()->SetMouseVisible(true);
// Load XML file containing default UI style sheet
auto* cache = GetSubsystem<ResourceCache>();
auto* style = cache->GetResource<XMLFile>("UI/DefaultStyle.xml");
// Set the loaded style as default style
uiRoot_->SetDefaultStyle(style);
// Initialize Window
InitWindow();
// Create and add some controls to the Window
InitControls();
// Create a draggable Fish
CreateDraggableFish();
// Set the mouse mode to use in the sample
Sample::InitMouseMode(MM_FREE);
}
void HelloGUI::InitControls()
{
// Create a CheckBox
auto* checkBox = new CheckBox(context_);
checkBox->SetName("CheckBox");
// Create a Button
auto* button = new Button(context_);
button->SetName("Button");
button->SetMinHeight(24);
// Create a LineEdit
auto* lineEdit = new LineEdit(context_);
lineEdit->SetName("LineEdit");
lineEdit->SetMinHeight(24);
// Add controls to Window
window_->AddChild(checkBox);
window_->AddChild(button);
window_->AddChild(lineEdit);
// Apply previously set default style
checkBox->SetStyleAuto();
button->SetStyleAuto();
lineEdit->SetStyleAuto();
}
void HelloGUI::InitWindow()
{
// Create the Window and add it to the UI's root node
window_ = new Window(context_);
uiRoot_->AddChild(window_);
// Set Window size and layout settings
window_->SetMinWidth(384);
window_->SetLayout(LM_VERTICAL, 6, IntRect(6, 6, 6, 6));
window_->SetAlignment(HA_CENTER, VA_CENTER);
window_->SetName("Window");
// Create Window 'titlebar' container
auto* titleBar = new UIElement(context_);
titleBar->SetMinSize(0, 24);
titleBar->SetVerticalAlignment(VA_TOP);
titleBar->SetLayoutMode(LM_HORIZONTAL);
// Create the Window title Text
auto* windowTitle = new Text(context_);
windowTitle->SetName("WindowTitle");
windowTitle->SetText("Hello GUI!");
// Create the Window's close button
auto* buttonClose = new Button(context_);
buttonClose->SetName("CloseButton");
// Add the controls to the title bar
titleBar->AddChild(windowTitle);
titleBar->AddChild(buttonClose);
// Add the title bar to the Window
window_->AddChild(titleBar);
// Apply styles
window_->SetStyleAuto();
windowTitle->SetStyleAuto();
buttonClose->SetStyle("CloseButton");
// Subscribe to buttonClose release (following a 'press') events
SubscribeToEvent(buttonClose, E_RELEASED, URHO3D_HANDLER(HelloGUI, HandleClosePressed));
// Subscribe also to all UI mouse clicks just to see where we have clicked
SubscribeToEvent(E_UIMOUSECLICK, URHO3D_HANDLER(HelloGUI, HandleControlClicked));
}
void HelloGUI::CreateDraggableFish()
{
auto* cache = GetSubsystem<ResourceCache>();
auto* graphics = GetSubsystem<Graphics>();
// Create a draggable Fish button
auto* draggableFish = new Button(context_);
draggableFish->SetTexture(cache->GetResource<Texture2D>("Textures/UrhoDecal.dds")); // Set texture
draggableFish->SetBlendMode(BLEND_ADD);
draggableFish->SetSize(128, 128);
draggableFish->SetPosition((graphics->GetWidth() - draggableFish->GetWidth()) / 2, 200);
draggableFish->SetName("Fish");
uiRoot_->AddChild(draggableFish);
// Add a tooltip to Fish button
auto* toolTip = new ToolTip(context_);
draggableFish->AddChild(toolTip);
toolTip->SetPosition(IntVector2(draggableFish->GetWidth() + 5, draggableFish->GetWidth() / 2)); // slightly offset from close button
auto* textHolder = new BorderImage(context_);
toolTip->AddChild(textHolder);
textHolder->SetStyle("ToolTipBorderImage");
auto* toolTipText = new Text(context_);
textHolder->AddChild(toolTipText);
toolTipText->SetStyle("ToolTipText");
toolTipText->SetText("Please drag me!");
// Subscribe draggableFish to Drag Events (in order to make it draggable)
// See "Event list" in documentation's Main Page for reference on available Events and their eventData
SubscribeToEvent(draggableFish, E_DRAGBEGIN, URHO3D_HANDLER(HelloGUI, HandleDragBegin));
SubscribeToEvent(draggableFish, E_DRAGMOVE, URHO3D_HANDLER(HelloGUI, HandleDragMove));
SubscribeToEvent(draggableFish, E_DRAGEND, URHO3D_HANDLER(HelloGUI, HandleDragEnd));
}
void HelloGUI::HandleDragBegin(StringHash eventType, VariantMap& eventData)
{
// Get UIElement relative position where input (touch or click) occurred (top-left = IntVector2(0,0))
dragBeginPosition_ = IntVector2(eventData["ElementX"].GetInt(), eventData["ElementY"].GetInt());
}
void HelloGUI::HandleDragMove(StringHash eventType, VariantMap& eventData)
{
IntVector2 dragCurrentPosition = IntVector2(eventData["X"].GetInt(), eventData["Y"].GetInt());
UIElement* draggedElement = static_cast<UIElement*>(eventData["Element"].GetPtr());
draggedElement->SetPosition(dragCurrentPosition - dragBeginPosition_);
}
void HelloGUI::HandleDragEnd(StringHash eventType, VariantMap& eventData) // For reference (not used here)
{
}
void HelloGUI::HandleClosePressed(StringHash eventType, VariantMap& eventData)
{
if (GetPlatform() != "Web")
engine_->Exit();
}
void HelloGUI::HandleControlClicked(StringHash eventType, VariantMap& eventData)
{
// Get the Text control acting as the Window's title
auto* windowTitle = window_->GetChildStaticCast<Text>("WindowTitle", true);
// Get control that was clicked
auto* clicked = static_cast<UIElement*>(eventData[UIMouseClick::P_ELEMENT].GetPtr());
String name = "...?";
if (clicked)
{
// Get the name of the control that was clicked
name = clicked->GetName();
}
// Update the Window's title text
windowTitle->SetText("Hello " + name + "!");
}